Think about how different Elections would be if we went straight popular vote. Entire sections of the country would be ignored. Politicians could camp out in urban centers. The Electoral College is a nod to States Rights. An acknowledgement that this is a Republic.
I don't think this makes sense.
So, first, it's obviously kind of weird to be saying that if we got rid of the electoral college "entire sections" of the country would be ignored. Right now almost
all of the country is ignored - that it creates safe and swing states is one of the main reasons that people don't like the electoral college. When we talk about voting third party and how it's terrible we have to add "as long as you live in a swing state", but if you don't live in a swing state then knock yourself out because lol your vote doesn't matter.
Second, why would campaigning look hugely different? I mean, to win a swing state you also have to win a majority of its votes, but politicians don't spend all of their time in the biggest cities in swing states. Is the idea that this only happens in swing states
because so much of the country is irrelevant? Are candidates actually just reaching saturation in the cities in swing states and are therefore forced out into the countryside to scrounge up marginal votes? This doesn't seem very plausible to me. Like, is voter turnout in swing state cities much higher than voter turnout outside of them?
I mean, Florida is fairly urbanized. Ohio is kind of middle-of-the-road. New Hampshire is relatively rural. But even New Hampshire's got cities. Most campaigning is about media coverage, not about appealing directly to people face-to-face. And 40% of the country doesn't live in cities, so of course candidates are going to want to appeal to voters outside of cities, and they'll look for opportunities to get their message out.
Third, who cares where politicians are campaigning? Surely what matters is whose interests they're representing, but this makes it even clearer that mostly what matters is media coverage. If I'm a rural farmer, I'd much rather politicians promise massive farm subsidies in speeches that they give in big cities than have them come to my local diner and not promise massive farm subsidies. And of course politicians would have reason to compete for the votes of the 40% of the country that doesn't live in cities. It's stupid to establish battle lines and go all out over a few percentage points in the cities if nobody is even trying to get votes from this other 40%.
Fourth,
if we were going to come up with something like the electoral college from scratch, in order to fiddle with the importance of different groups of voters to get something that produces nicer results than 1 person 1 vote, there's no way that we'd come up with the system we've got. Like, the usual justification - the one you seem to be appealing to - is that without the electoral college there's this minority of the population (rural voters) whose interests aren't going to be appropriately considered. Now, I don't think that's really true, but that's the argument. If that's a good argument then here's a fantastic argument: we should just make black people's votes count three times as much.
That said, just going to a national popular vote would definitely cause our elections to look very different, but not because of what the presidential candidates would do. Doing this would totally change the incentives states face in writing election laws. What if California adopts mandatory voting?